Red Ginseng for Erectile Dysfunction: Some Promise, Weak Evidence

Red ginseng may help a little in mild erectile dysfunction (ED), but the evidence is weak. The trials are small, short and use different products. Neither the NHS nor NICE recommends it for ED, and it is not a licensed treatment for the condition.

Why people reach for it#

Red ginseng is Panax ginseng root that has been steamed and dried. White ginseng is the same plant, just dried without steaming. American ginseng is a related plant, and Siberian ginseng is a different plant altogether, so trial results do not carry across.

The idea is that compounds called ginsenosides help the body make nitric oxide. This chemical relaxes the blood vessels in the penis so blood can flow in. That has been shown in lab and animal studies. It has not been properly shown in men.

What the trials found#

A few small randomised trials compared Korean red ginseng with placebo (a dummy capsule). Some found better erection scores after about 8 weeks. Others found no clear difference.

Reviews of these trials reach a cautious verdict. The studies are small, often a few dozen men each. They are short, and the products and doses differ. Many do not say how men were chosen or how results were measured. That makes the benefit hard to trust.

There is a second problem. In ED, placebo can work surprisingly well, partly because performance anxiety plays a big role. A small improvement in a small trial may simply reflect expectation.

Ginseng berry extract, which comes from a different part of the plant, showed better scores than placebo in one multicentre trial. It is still only one trial, and the extract is not the same as red ginseng root.

Dose, quality and safety#

One often-quoted trial used 900mg of Korean red ginseng three times a day for 8 weeks. UK products vary widely. Many are food supplements, and the amount of ginsenosides is not standardised. A capsule labelled "red ginseng" may contain far less than the trial dose.

Some products carry a Traditional Herbal Registration (THR) from the MHRA. This means the product meets standards for quality and safety, and is used for a traditional purpose. It does not mean it has been proven for ED.

Common side effects are headache, trouble sleeping and an upset stomach. Ginseng can also interact with other medicines:

• Warfarin: studies disagree, but it may change how well warfarin works. Tell your anticoagulant clinic first.
• Diabetes medicines: ginseng may lower blood sugar further.
• MAOI antidepressants: it may cause agitation and sleeplessness.
• Blood pressure medicines: effects on blood pressure vary between people.
• Surgery: stop it and tell your surgical team beforehand.

There is no good data on taking it with sildenafil or tadalafil. Ask a pharmacist before combining them. Never combine any ED medicine with nitrates such as GTN spray or isosorbide mononitrate.

Be wary of anything sold online as "herbal Viagra". The MHRA has repeatedly found sexual enhancement products containing undeclared sildenafil or tadalafil. You would be taking a strong medicine without knowing it. Our guide to Kamagra oral jelly covers this risk in more detail. If a supplement causes a reaction, report it through the MHRA Yellow Card scheme.

A fair verdict#

Red ginseng is not dangerous for most healthy men, and a trial of 8 to 12 weeks is reasonable if you accept the evidence is thin. Choose a THR-registered product and stick to the label dose. Do not expect it to match prescription tablets.

The licensed options have much stronger evidence. The NHS recommends PDE5 inhibitors such as sildenafil and tadalafil as first-line treatment, along with lifestyle changes and, where relevant, psychosexual therapy. At Totiva, sildenafil 50mg starts at £6.99 for 4 tablets and tadalafil 10mg at £7.49 for 4, after a free online consultation.

One more point matters. ED can be an early sign of heart disease or diabetes. Trying a supplement for months can delay a check-up you may need. If your ED is new, sudden, or comes with chest pain or low sex drive, get it assessed rather than self-treating.

If you want to see how the proven treatments work and who they suit, start with our ED treatment hub.